Mimopeus neglectus is a species of darkling beetle in the subfamily Tenebrioninae, first described by J. C. Watt in 1988.

[1] It occurs around the Cook Strait area of New Zealand, on both the North and South Islands.

[2] The beetles are a reddish brown or black colour, with a shiny underside.

[1] The species is similar morphologically to the North Island Mimopeus elongatus, however has a consistently different tapered structure of aedeagus.

[1] Unlike Mimopeus elongatus which consistently prefers living around Muehlenbeckia complexa plants, Mimopeus neglectus does not show a preference for exclusively preferring Muehlenbeckia complexa, and can be found around a variety of coastal grasses.